Pakistan, June 1 -- Marta Kostyuk produced one of the biggest upsets of the 2026 French Open on Sunday, defeating former champion Iga Swiatek 7-5, 6-1 to reach the quarter-finals and end the Pole's bid for a fifth title at Roland Garros.

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The victory marked Kostyuk's first-ever French Open quarter-final appearance and extended a remarkable run on clay this season. The Ukrainian displayed confidence and composure throughout the match, recovering from early pressure before taking control in the second set to secure a memorable win.

Swiatek, widely regarded as one of the strongest clay-court players in the world, struggled to find her rhythm on her 25th birthda...